106 NORTH AMERICAN FLORA [Volume 34 



hairy at the base; scape about 1 dm. high, sparingly silky; involucre 7-8 mm. high, 12-15 mm. 



broad, silky; bracts elliptic or oblong, acute or obtuse; ligules about 12 mm. long, 5 mm. 



wide; disk-corollas 4 mm. long; achenes 3 mm. long, densely hirsute; squamellae 3 mm. long, 



obovate, abruptly acuminate. 



Type locality: Dyer Mine in the Uintah Mountains, Utah. 

 Distribution: Colorado and Utah. 



15. Tetraneuris angustifolia Rvdb. Bull. Torrey Club 32 ; 128. 



1905. 



An acaulescent cespitose perennial, but the branches of the caudex rather slender, short; 

 leaves clustered, linear-oblanceolate to linear, 4-10 cm. long, 3-5 mm. wide, loosely and 

 sparingly long-villous, or glabrate in age, not densely villous at the base; scape 2-3 dm. long, 

 strigose; involucre hemispheric, 6 mm. high, about 10 mm. broad, densely villous; bracts 

 oblong, obtuse, densely villous; ligules about 1 cm. long and 4 mm. wide, conspicuously 4- 

 nerved; disk-corollas 3.5 mm. long; tube 1 mm. long; achenes 3 mm. long, densely hirsute; 

 squamellae 2 mm. long, lanceolate, acuminate. 



Type locality: White Mountains, New Mexico. 

 Distribution: New Mexico, Colorado, and Texas. 



16. Tetraneuris fastigiata Greene, Pittonia 3 : 268. 1898. 



Tetraneuris slenophylla Rydb.; Britton, Man. 1009. 1901. 

 Aclinella fastigiata A. Nelson; Coult. & Nels. Man. 560. 1909. 



An acaulescent perennial, branching underground; leaves crowded; blades narrowly 

 linear, 2-4 cm. long and about 2 mm. wide, sparingly long-hairy, glabrate, conspicuously 

 punctate, the bases broadened and 3-ribbed; scape 5-10 cm. high, strigose; involucre 6 mm. 

 high, 10-12 mm. broad; bracts oval, obtuse or acutish, more or less villous; ligules about 

 10 mm. long and 4 mm. wide; disk-corollas 3 mm. long; tube very short; achenes 3 mm. long, 

 densely hirsute; squamellae 2 mm. long, ovate-lanceolate, acuminate. 



Type locality: Coolidge County, Kansas. 

 Distribution: Plains of Kansas and Colorado. 

 Illustration: Britt. & Brown, 111. Fl. ed. 2./. 4538. 



17. Tetraneuris linearis (Nutt.) Greene, Pittonia 3: 267. 1898. 



Aclinella scaposa linearis Nutt. Trans. Am. Phil. Soc. II. 7: 379. 1841. 

 Ptilepida linearis Britton, Mem. Torrev Club 5: 340. 1894. 

 Aclinella linearis A. Nelson; Coult. & Nels. Man. 560. 1909. 



A scapose cespitose perennial, with a woody branching caudex, almost suffruticose ; branches 

 elongate, 5-15 cm. long, ascending or decumbent; leaves crowded; blades narrowly linear, 

 sparingly long-hairy and conspicuously punctate; scape 10-15 cm. long, strigose; involucre 

 5-6 mm. high, 8-10 mm. broad, villous; bracts elliptic, acute; ligules 8-10 mm. long, 4-6 

 mm. wide, strongly veined; disk-corollas 3 mm. long, puberulent; tube very short; achenes 

 densely hirsute, 3 mm. long; squamellae lanceolate, acuminate, 2 mm. long. 



Type locality: Texas. 



Distribution: Texas, New Mexico, Chihuahua, and Coahuila. 



18. Tetraneuris angustata Greene, Pittonia 3 : 267. 1898. 



A perennial, with a rather slender cespitose rootstock; leaves narrowly linear, 5-10 cm. 

 long, about 1 mm. wide, sparingly hairy and punctate; scape about 2 dm. long, slender; in- 

 volucre 5-6 mm. high, about 10 mm. broafd, densely silky- villous; bracts elliptic, obtuse; 

 ligules 10-12 mm. long, 5-6 mm. wide; disk-corollas 3 mm. long, glandular-puberulent; tube 

 less than 1 mm. long; achenes 3 mm. long, hirsute; squamellae ovate, 1.5 mm. long, the midrib 

 produced into a short awn.. 



Type locality: State of Chihiiahua. 

 Distribution: Chihuahua. 



